These task cards are great for practicing adding and subtracting intervals of time / elapsed time in problem solving situations. Use as scoot or scavenger hunt, with math groups, or for early finishers.
Elapsed Time Word Problems with Number Lines Freebie!This common core elapsed time practice worksheet has four elapsed time word problems with open number lines. It can be used as classwork, homework, or as an assessment tool. This is a sample page from my Elapsed Time on a Number Line and More (Bundle).